New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured by Mr. G. Calver, F.R.A.S. / with Directions for Silvering, Adjusting, &c.

by George Calver

LIST OF OBJECTS SEEN WITH A 5-1/4 INCH REFLECTOR.

ξ Scorpii (5, 5·2 : 1″·3) clearly divided, 186 power.

ε Lyræ. Debilissima quite easy; 186, 380 powers, though nearly half Moon.

μ¹ Herculis (9·4, 10 : 1″·04). Just divided, 380. Very difficult, owing to its faintness.

Vega. 11 mag., comes quite plain, only 47 minutes before sunrise; powers 110, 186.

φ Virginis (5, 13 : 4″·27). Comes plain, 110, 186.

ν Scorpii, the close pair (4, 5 : 0″·8), well elongated, power 380; small star (7, 8 : 1″·68) divided, 110.

ζ Boötis (4, 5 : 0″·88) elongated 186, notched 380, and with field lens removed, all but divided.

δ Cygni (3, 9 : 1″·63), 9 plain, 380 on several occasions.

Antares is chiefly an atmospheric test, but the companion was quite plain on one occasion out of the three I looked for it.